You have 1.4TB library? That is quite a huge library. How many songs? Are they MP3s or uncompressed? Do you listen to all of it?
At 176K per second of uncompressed (CD-quality, anyhow) music, 1.4TB comes to just over 100 days. Several times that figure, with compression. That's a lot of music. More unique audio data than total amount that I've listened to on repeat for...probably about the last 5 years added together.
That's not saying that there aren't larger ones, that the collector would consider themselves unusual, that any value judgement should be implied, etc. Just that more than a couple months worth of unique audio data seems like "a lot" to me.
I've listened to nearly all of it.